Advantages, disadvantages and differences between DC brush motors and DC brushless motors

Our commonly used motors are DC motors, DC motors can be divided into brushed motors and brushless motors, so what are the advantages and disadvantages of each of them?

DC brushed motor advantages and disadvantages.

1. Disadvantages of brush motor.

a. There is friction between the brushes and commutator, which leads to lower efficiency, increased noise and easy to generate heat, so the life is relatively short.

b. Maintenance is very troublesome, need to constantly replace the brushes.

c. The output power is relatively low due to the high resistance and low efficiency.

d. The friction between brushes and commutator generates sparks and a lot of interference.

2. Advantages of brushed motor.

a.Excellent low speed torque performance, large torque.

b.Compared with brushless motor, it has less electronic parts and is cheaper than brushless motor.

c. Lack of electronic parts makes it less susceptible to sensor interference, electronic parts failure, etc.

DC brushless motor advantages and disadvantages.

1. Disadvantages of brushless motor.

a.It needs brushless ESC to work together, and the price is higher than brush motor.

b. Reliability is affected by the electronic parts, or the sensor is disturbed, the motor will fail.

2. Advantages of brushless motor.

a. No friction between brush and steering, low noise, low vibration, low heat generation and long life.

b. No need to replace brushes, easy maintenance.

c.The brushes do not generate sparks and the interference is small.

d.Excellent torque characteristics, good low and medium speed torque performance, large starting torque and small starting current.

These are the advantages, disadvantages and differences between brush DC motors and brushless DC motors, mastering the knowledge of both to better use them and bring help to our production life!

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